Fly Racing Kinetic Blocks Pants FLY designed its Kinetic racewear to complement a rider’s natural movements on the motorcycle. No unnecessary distractions; just straightforward no-nonsense function, fit & style. Ultra-durable Multi-panel 900D Construction – to withstand the rigors of track & trail while providing extra breathability Boot-Tether Compliant – three-level tether eyelets for easy installation of Asterisk® knee brace boot tether straps Leather Heat Shield Panels with Kevlar® Stitching – located on the inside of each leg for durability & heat resistance Ergonomically Pre-shaped & Fully Vented Knee – generously contoured to accommodate all types of knee braces & guards while a massive air-intake system cools & protects Ratcheting Fly Closure – allows for adjustability & positive closure for a secure fit All-new Zipper Lock System – exclusive zipper lock system keeps pants closed & secure Adjustable Waist Belt – for maximum fit & adjustability S